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A new paper with the above title has been published in the journal "Palgrave Communications" by Dustin Tingley and Gernot Wagner. https://www.nature.com/articles/s41599-017-0014-3 Abstract: Discourse on social media of solar geoengineering has been rapidly increasing over the past decade, in...

A recent paper suggests (somewhat unexpectedly) that rational arguments and ridiculing can be effective against conspiracy beliefs, but emotional arguments are not. Orosz, G., Krekó, P., Paskuj, B., Tóth-Király, I., Bőthe, B., & Roland-Lévy, C. (2016): Changing Conspiracy Beliefs through...

ChimeIn is a novel tool (browser add-on/mobile app) that makes all web sites commentable: https://www.chimein.co/ Might be useful for debunking when used on bunk web sites that do not allow commenting or heavily moderate comments. Of course, the comments are only seen by people who have...

I have noticed that Dane Wigington has added a new section to his article criticizing the new study: Caldiera states above "it is possible that climate change is causing 'contrails' to persist for longer periods than ye used to". Lets examine this statement. For "condensation trails" to increase...

Dane Wigington's "legal team" has filed a "60-day notice", which can be downloaded as a 33-page PDF file. It lists a lot of high-ranking officials of various institutions as "violators" and "delinquent regulators". Then it claims: Based on research, investigation and resulting evidence (both...

Some sources have claimed that a Dutch politician or government official has admitted that geoenginering is taking place. For example on Yournewswire: Dutch Government Admit Chemtrails exist, or on Geoengineering Watch: Netherlands Department Of The Environment Officer Is Confronted About...

Chuck Norris argues for the chemtrail theory again in his latest article: Sky Criminals First he cites the research of NOAA research scientist Charles Long, who said at a meeting last year that airplane contrails may be creating accidental geoengineering. Norris suggests that it may not be...

Climate scientist Paul Beckwith has posted a Youtube video where he debunks chemtrails by proposing that cleaner jet fuel and the physical and chemical changes in the atmosphere due to global warming make persistent contrails last longer because they consist of much smaller water droplets / ice...

Interesting flight path here. What was this plane doing? Was it performing some kind of test? Testing navigational instruments maybe? The plane is Horizon Air N410QX, a Bombardier Dash 8. This is a twin-engine turboprop plane that can carry 78 passengers.

Patrick Roddie of San Francisco has posted this video showing a strange double halo: What is this? I can't find anything like that in the atmospheric optics resources.

A recent paper by Austrian scientists seeks to answer this question: Weihs P, Rennhofer M, Baumgartner DJ, Gadermaier J, Wagner JE, Gehring JE, Laube W. Potential impact of contrails on solar energy gain. Atmospheric Measurement Techniques. 2015 Mar 5;8(3):1089-96. It contains very interesting...

This video was posted on December 6 by Madisonstar Moon, and now it's over 21k views, 735 shares: Video on Facebook Some screenshots from the video: It shows parallel lines of clouds which the voiceover identifies as "chemtrails", and people are raging how unnatural they are. They do not...

Dane Wigington wrote about the ozone hole again, this time citing a recent report about the record size of the Antarctic ozone hole: We are being lied to on every level and to an unimaginable degree. The supposedly recovering Southern hemisphere ozone layer has hit a new record size, but "don't...

Dane Wigington has posted a congressional report on weather modification from 1978: http://www.geoengineeringwatch.org/massive-us-senate-document-on-national-and-global-weather-modification/ It's an interesting document, but Dane cut parts out of it selectively and misleadingly. For example, he...

Thanks to the chemtrail theory, I got interested in the science of contrails, and I sometimes browse the latest articles on Google Scholar. So I thought a thread in which we report on the latest findings or interesting new articles could be useful. I just found this one: Bernhardt, J. and...

But aerodynamic contrails look in fact quite similar to exhaust contrails themselves: The part close to the wing is different, but then the turbulent region after about 50 m is hard to distinguish from an exhaust contrail. And I don't see why it couldn't form pendules. Skywriting smoke forms...

In this video, an airplane makes a contrail that quickly disappears. But then after a short while, it seems to reappear and start to spread. Is this possible? If not, what is happening in the video?

This photo was posted a few days ago on the USA TODAY web site: Legend: "Cloud ripples: Intersecting ripples appear in a cloud layer over the Texas Panhandle last week. The photo was submitted to USA TODAY via Your Take at yourtake.usatoday.com Elizabeth Williams-Cox, Your Take" In this...

The beginning of this video (from about 0:25 to 1:45) shows an old footage of what seems to be a military experiment to hide a battleship by creating a cloud curtain by dropping some stuff from an airplane: I find it impressive. Does anyone know more about this? Is this for real? When did this...

I just encountered this picture that tries to argue that two trails come from each engine of the plane in the photo, and one is an ordinary contrail while the other must be a chemtrail. The original photo is from airliners.net. Indeed, it looks like there are two distinct parts of the trails...